Table 2.

Summary of ¹³C CSA parameters measured for U-¹⁵N-labeled NAV sample.

	R1013		R1014
#	δσ (ppm)	ησ	δσ (ppm)	ησ	δσ (ppm)2	ησ2
Cα	26.3	0.48	24.6	0.51	26.0	0.36
Cβ	10.3	1.0	10.8	1.0	11.0	1.0
C1	21.8	0.69	21.2	0.70	…	…
Cγ1	19.0	0.59	18.9	0.61	18.5	0.58
Cγ2	18.1	0.32	19.0	0.30	17.5	0.65
Co	84.6	0.50	83.6	0.55	85.4	0.49

¹Note: R10₁³ and R10₁⁴ symmetry sequences were employed for σ₂- and σ₁-CSA recoupling. The MAS frequency was 10 kHz. Note that recoupling of ¹³C CSA is efficiently performed with these sequences for the natural abundance carbon sites in this sample.

²Data reported for U-¹³C,¹⁵N-val enriched NAV sample (Reference ²⁵).